Its over my head, so I sent it to my mate Rich. He replied with:
I've been using CoPilot for the last couple of weeks, it plugs into my vscode and phpstorm ide's and uses's GitHubs artificial intelligence system to suggest code as you type. It's very impressive, but it's not truely intelligent - it doesn't understand the code that it suggests, it's given me plenty of broken solutions, but most of the time it's suggests are perfect.